my friends at school have crazy internet speeds and a student which is really computer smart did smth to his wifi and then its flying

It sounds like your friend may have optimized their Wi-Fi network for better performance. There are several ways to improve Wi-Fi speeds, and here are some common methods:

**Router Placement**: Positioning the router in a central location can help ensure even coverage throughout the area. Avoid placing it near walls or obstructions.

**Upgrading Equipment**: Using a newer router that supports the latest Wi-Fi standards (like Wi-Fi 6) can greatly improve speeds.

**Changing Channels**: Wi-Fi networks can operate on different channels. Switching to a less congested channel may reduce interference from other networks.

**Using Ethernet**: Connecting devices directly to the router using an Ethernet cable often provides faster and more stable connections.

**Quality of Service (QoS)**: Some routers allow users to prioritize bandwidth for specific devices or applications, which can help improve performance for gaming or streaming.

**Firmware Updates**: Keeping the router's firmware up to date can resolve bugs and improve performance.

**Network Extenders or Mesh Systems**: If the coverage area is large, adding extenders or using a mesh Wi-Fi system can help eliminate dead zones.

**Security Settings**: Ensuring that only authorized users are connected to the network can free up bandwidth for legitimate users.

**Modem Upgrade**: If the internet plan allows for higher speeds, upgrading the modem can help achieve those speeds.

If your friend made the Wi-Fi super fast, they likely did one or more of these things. You might ask them for tips on how to do the same!